Luminescent ZnS:Cu films prepared by chemical methods

Abstract

For the first time, ZnS:Cu films with an intense photoluminescence were prepared by a chemical nonvacuum method. They were produced by means of the combined pyrolytic deposition of zinc and copper dithiocarbamates onto glass and ceramic substrates heated up to 260–300°C. A close packing of practically identical grains is characteristic of these films, with grain sizes depending on the substrate type. The photoluminescence and electroluminescence spectra include the blue, green, and yellow bands typical of copper. The band-intensity ratio depends on the film-preparation conditions, as well as on their excitation, which makes it possible to change the emission color of radiators in a wide range (from blue to white).